Windmill attachment



UNITED STATES PATENT OFFICE.

RABB A. BERTRAND, OF PURMELA, TEXAS.

WINDMILL ATTACHMENT.

Application filed July s, 1918.

To all whom it mag concern:

Be it known that I, RABB A. BERTRAND, a citizen of the United States, residing at Purmela, in the county of Coryell and State of Texas, have invented certain new and useful Improvements in Windmill Attachments; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of the invention is to provide a simple, inexpensive and eflicient attachment for pumps adapted for actuation by hand or windmill whereby an equalization of strokes, that is of water lifting and return strokes, is secured, to reduce the stress of the upward or load movingstroke to facilitate the operation of the pump and enable it to be operated with less power on the load moving stroke. It is a well recognized fact that under the ordinary construction and arrangement of the parts of a windmill pump the diflerence between the idle and load strokes is such that with a very light wind the apparatus becomes inoperative, and it is only when the movement of the air is sufficiently strong to actuate the pump on the much heavier or load stroke that any effective operation of the pump can be secured. By equalizing the strokes, that is by reducing the load stroke or the energy necessary to move the pump piston during the upward or load stroke, it is possible to adapt a pump when operated by a windmill to serve even with a very light and gentle movement of the air, so that a practically continuous operation can be secured, and the disadvantage of depriving cattle, which are dependent upon the action of a pump for water, when the wind is light or gentle is thereby avoided.

Further objects and advantages will appear in the course of the following description, it being understood that changes in form, proportion and details may be resorted to within the scope of the appended claim without departing from the spirit of the invention.

In the drawing:

Figure 1 is a side view of a pump adapted for windmill or hand operation provided with an attachment embodying a preferred form of the invention.

Fig. 2 is a detail sectional view of the attachment.

Specification of Letters Patent.

Patented Dec. 23, 1919.

Serial No. 243,574.

Fig. 3 is a similar view taken at right angles to the plane of Fig. 2.

Fig. 4 is a detail view of one of the clamp members.

In connection with a pump of any preferred type having the usual barrel 10, piston rod 11 and guide 12, for actuation either by a windmill through a connection 13 or a handle 14:, is a yoke 15 provided with depending arms 16 in which are arranged set screws 17 for engagement with the head 18 of the pump barrel, an expansion coiled spring 19 being seated as at 19 upon the horizontal portion of said yoke and embracing an adjacent portion of the pump rod, and seated at its upper end as at 20 upon a clamp 21 which snugly embraces the pump rod and consists of separate members 22, one of which is illustrated in detail in Fig. 4, connected by transverse bolts 23. As shown in the drawing, the adjacent edges of said members of the clamp may be serrated as at 24, as may also be the seats 25, which engage opposite side surfaces of the pump rod, so that accidental or premature disarrange ment of the parts may be prevented.

When the attachment is applied to a pump, after properly attaching the yoke and seating the spring thereon, the clamp should be depressed against the action of the spring until a sufficient tension of the latter has been secured to practically equal the amount of the load which will be carried by the piston of the pump during its upward or operative stroke. When in opera tion the downward stroke of the piston therefore will be in opposition to the spring 18 and will place it under increased tension, so that the downward stroke in resistance will substantially equal the upward load carrying stroke and consequently an operating power of not over one-half of that ordinarily required is necessary to cause the reciprocatory movement of the pump plunger and hence the elevation of the water, the main difference being that whereas in the ordinary construction, the down stroke of the plunger is idle and the entire load is carried during the upward stroke thereof, the employment of this attachment divides the load and equalizes the resistance of the downward and upward strokes so that a more even operation of the pump is secured and when actuated by wind ower a comparatively light breeze is su 'cient to keep the pump in operation and therefore the cattle dependent thereupon supplied with the necessary water.

It will be obvious, moreover, that the reduction of strain on the load stroke minimizes the wear on the elements of the pump mechanism and the necessity for and cost of repairs, and increases the durability of the structure within relatively broad limits.

Having described the invention, I claim:

As an article of manufacture, a stroke equalizing attachment for pumps having a yoke and means for securing the same to a pump head, a clamp and means for securing the same adjustably to a pump rod above the said pump head, and a spring interposed between said yoke and clamp and terminally seated respectively thereon in coiled relation to the said pump rod for opposing the downward or idle stroke of the pump rod to an extent approximating the resistance incurred by the said rod during its upward or load carrying stroke.

In testimony whereof I atfix my signature in presence of two witnesses.

RABB A. BERTRAND. WVitnesses:

V. N. BENTLEY, B. H. HARTGRAVES. 

